vscode-jest-runner

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Comparison with vscode-jest

vscode-jest-runner is focused on running or debugging a specific test or test-suite, while vscode-jest is running your current test-suite everytime you change it.

Features

Simple way to run or debug a specific test As it is possible in IntelliJ / Webstorm

Run & Debug your Jest Tests from

• Context-Menu
• CodeLens
• Command Palette (strg+shift+p)

Supports

• yarn & vscode workspaces (monorepo)
• dynamic jest config resolution
• yarn 2 pnp
• CRA & and similar abstractions

Usage with CRA or similar abstractions

add the following command to settings, to pass commandline arguments

"jestrunner.jestCommand": "npm run test --"

Debugging JSX/TSX with CRA

for debugging JST/TSX with CRA you need to have a valid babel and jest config:

to add a babel.config.js with at least the following config

// babel.config.js
module.exports = {
    presets: [
      ["@babel/preset-env", { targets: { node: "current" } }],
      "babel-preset-react-app",
    ],
  };

add a jest.config.js with at least the following config

module.exports = {
  transform: {
    '\\.(js|ts|jsx|tsx)$': 'babel-jest',
    '\\.(jpg|jpeg|png|gif|ico|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga|webmanifest|xml)$':
      '<rootDir>/jest/fileTransformer.js'
  },
  moduleNameMapper: {
    '\\.(css)$': 'identity-obj-proxy'
  },
}

Check that debugger works:

Extension Settings

Jest Runner will work out of the box, with a valid Jest config.
If you have a custom setup use the following options to configure Jest Runner:

Command	Description
jestrunner.configPath	Jest config path (relative to ${workFolder} e.g. jest-config.json)
jestrunner.jestPath	Absolute path to jest bin file (e.g. /usr/lib/node_modules/jest/bin/jest.js)
jestrunner.debugOptions	Add or overwrite vscode debug configurations (only in debug mode) (e.g. "jestrunner.debugOptions": { "args": ["--no-cache"] })
jestrunner.runOptions	Add CLI Options to the Jest Command (e.g. "jestrunner.runOptions": ["--coverage", "--colors"]) https://jestjs.io/docs/en/cli
jestrunner.jestCommand	Define an alternative Jest command (e.g. for Create React App and similar abstractions)
jestrunner.disableCodeLens	Disable CodeLens feature
jestrunner.codeLensSelector	CodeLens will be shown on files matching this pattern (default **/*.{test,spec}.{js,jsx,ts,tsx})
jestrunner.codeLens	Choose which CodeLens to enable, default to ["run", "debug"]
jestrunner.enableYarnPnpSupport	Enable if you are using Yarn 2 with Plug'n'Play
jestrunner.projectPath	Absolute path to project directory (e.g. /home/me/project/sub-folder)
jestrunner.changeDirectoryToWorkspaceRoot	Changes directory to workspace root before executing the test
jestrunner.preserveEditorFocus	Preserve focus on your editor instead of focusing the terminal on test run

Shortcuts

click File -> Preferences -> Keyboard Shortcuts -> "{}" (top right) the json config file will open add this:

1{
2  "key": "alt+1",
3  "command": "extension.runJest"
4},
5{
6  "key": "alt+2",
7  "command": "extension.debugJest"
8},
9{
10  "key": "alt+3",
11  "command": "extension.watchJest"
12},

Want to start contributing features?

Some open topics get you started

Steps to run in development mode

• npm install
• Go to Menu "Run" => "Start Debugging"

Another vscode instance will open with the just compiled extension installed.

Notes from contributors

• Babel compile Issue when starting Debug in JSX/TSX,

  • check the post of @Dot-H https://github.com/firsttris/vscode-jest-runner/issues/136
  • https://github.com/firsttris/vscode-jest-runner/issues/174

• By default Jest finds its config from the "jest" attribute in your package.json or if you export an object module.export = {} in a jest.config.js file in your project root directory.
  Read More: Configuring Jest Docs

• If Breakspoints are not working properly, try adding this to vscode config:

1"jestrunner.debugOptions": {
2    "args": ["--no-cache"],
3    "sourcemaps": "inline",
4    "disableOptimisticBPs": true,
5}